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          Institute: MPI für Chemische Physik fester Stoffe     Collection: publications 2013     Display Documents



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ID: 667528.0, MPI für Chemische Physik fester Stoffe / publications 2013
Spin excitons in the unconventional superconducting and hidden order state of strongly correlated electrons
Authors:Thalmeier, P.; Akbari, A.
Language:English
Date of Publication (YYYY-MM-DD):2013-03-06
Title of Journal:European Physical Journal B
Volume:86
Issue / Number:3
Start Page:82-1
End Page:82-6
Sequence Number of Article:82
Review Status:not specified
Audience:Not Specified
Abstract / Description:The formation of collective spin excitons below the single particle continuum is observed in numerous unconventional superconductors. CeCoIn5 is the most well established case for heavy fermion compounds. It is also the first example where the splitting of magnetic excitons by a magnetic field is observed for fields within the tetragonal plane. Contrary to expectations it is revealed as a doublet excitation. We explain the splitting as the result of a strongly anisotropic spin response described within the context of an Anderson lattice type model. Recently it was shown that collective spin excitations also appear within the hidden order phase of non- superconducting CeB6. It is a signature of the itinerant nature of spin response as opposed to the commonly used localized 4f approach in this compound. We show that the salient features of the spin exciton can be explained in an itinerant quasiparticle model supplemented by hidden and antiferromagnetic order.
External Publication Status:published
Document Type:Article
Communicated by:Ina Werner
Affiliations:MPI für chemische Physik fester Stoffe
Identifiers:ISI:000317012300010 [ID No:1]
ISSN:1434-6028 [ID No:2]
DOI:10.1140/epjb/e2012-30896-0
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